Electric solenoid.



G. W. COLLIN.

ELECTRIC SOLENOID.

APPLICATION FILED JUNEI, 1910.

1,033,543. Patented July 23,1912.

@ F El- 1 (L Q 3H1.) l 32 0 3 George W 007 x223 J1 50 Q6 Glliozn un UNITED STATES PATENT OFFICE, I

GEORGE W. COLLIN, OF BRIDGEPORT, CONNECTICUT, ASSIGNOB, TO THE COLLIN VALVE A COMPANY, OF PORTLAND, MAINE, A CORPORATION OF MAINE.

ELECTRIC SOLENOID.

t-ain new'and useful Improvements in Elec tric Solenoids, of which the following is a specificat'ion.

My invention relat es. to an improvedform of electric solenoid, adapted for various uses and particularly that of operating." steam admission valves, tripping mecha-.-

nisms for valves and .other formsof-device s.'

The objects of the invention areto improve the construction of solenoids,particularlv solenoids intended for the opera? tion of valves and the like. i

In the accompanying drawings forming a part of this specification I have shown my improved form of solen i'd', applied, to an improved form of steam admission valve, such as is shown for example in my Patent No- 949,294, dated February 15, 1910,

wherein the main valve is operated by- .a

piston, itself controlled by apilotvalve; In the accompanying drawings the improved solenoid herein described is sh-ownarra nged.

to operate the said pilot valve.

In the said drawings :-F1gure .1, shows-a side viewof a steam admission valve of the general type shown ininysaid Patent/$7 0. 949,294 with my improved form 0f,soleno1d' applied and connected up with batteries and thermostat as in use. Fig. 2,'is a cross sec-- tion through the valve and solenoid .taken on the axis of the pilot valve. P1

The type of valve shown in the drawings is that of a steam pressure admission" valve as employed in car heating systems anddesigned to be hsed between the main train steam piping and the car branch or servicepipe, one fvalve being used for each ca'r.

This valve is normally open allowing a free flow of steam to the piping of the car, when steam connections are made. This construction is such as to be well adapted to be operated by asolenoid when. connected'with battery and thermostatlocated within 'the car, thus insuring the automatic operation of the valve by the change of temperature within'the car and thereby affording means for providing uniform-heat for the car.

*6 represents the body of the valve, and to which the solenoid, solenoid case and other associate parts are connected.

(designates the inlet connection of Specification of Letters Patent. Pat'ented July 23, 1912 Application filed June 1, 1910. Serial No. 564,475.

valve body, and 26 an auxiliary or pilot valve, -control;l ing-. the action of the -m'ain ..'valve' as described inmy Patent No. 949,'294, 'saidpilot valve 26 being arrangedfitd be actuated, as hereinafter described, by the 27, thecoils of which solenoid are connected niostat3 0." V

- The thermostat is -obviously'for the pur' bv wires 25 with a battery 29 and-a then gpos'e bf-"malring 'and breaking the electric connection 'intermediat'e'the' batteries and plunger or armature'of the solenoid ma'gnet solenoid tooperate the lattrfand which in;

turn operatesan :auxiliary valve for. con-' trolling the main valve. L This-thermostat would obviously; be suitably' 'located within" '-the ,car, so as'tobe exposed to the temperatnref thereof, while the batteries. could be .located in any suitable place.: The auxiliary valve 26' comprises astem operatively mounted within afbore and arranged-at a right'angle to the passage 31. "The outer endof said bore is inclosed by. a plug 35 'while the inner end is enlarged as at 36 and provided with anoutlet 3-7 whereby-"any escaping steam 'or condensation from' the auxiliary' valve .Will be permitted to escape.

The auxiliary valve. stem 38 is reciprocat 'ingly mounted within a brasstube 39 at- .tached to the .body in line with such stem,

and is provided with a head 40 to prevent'it from dropping down.

; Exceptfor a soft iron core and an'iron armature, my improved solenoid is made of non-magnetic material, such as bronze-or brass and is clearly shown in Fig. 2: It;1s

inclosed in a suitablecase 41 that is detachmeans of screws 42-. A soft iron core 43 is pressed tightly'into the upper end of the bore of the solenoid spool, and its central hole snugly fits the tube 39 which is thread ably attached to the valve. The tube and core 'thus center the spool which is held inplace by the case and cap 46. Upon the spool of the solenoid is shown the usual wire windings 45, the outer layefis of which wires are covered by the before mentioned case 41 attached to the valve body.

the spool. A cylindrical shaped soft iron armature 49 is freely mounted in the lower end of the bore of the spool and is free to reciprocate vertically to and from the core 43. This armature is provided with a nonmagnetic brass liner 50 that extends below the armature proper and is provided with a bridge 51 that forms a means to abut against the end of the valve rod 38 for the operation of the auxiliary valve, when the solenoid is energized and the armature attracted. The armature is normally supported in position shown in Fig. 2, by reason of it resting on the upper end of the before mentioned collar 47 and thus located in juxtaposition with reference to the other parts as to be readily operated.

From the foregoing construction it will be seen that the armature can readily be taken out should occasion require by first removing the cap 46 and then the collar 47 which frees the armature and permits it to drop out. The stationary core 43 concentrates the lines of magnetic force between it and the armature when the solenoid is energized, multiplying the attraction of the ar mature, and its power to perform the function required.

It will be obvious that the distance of travel of the armature can be varied if desired, better to accommodate the character of work required. The nearer the moving armature a 'proaches the stationary core -1-.3 the reater is the force lifting the armature,

unti it contacts with core 43 when it is held with great power as long as the electric energy instantly and the armature drops to its normal position.

I do not wish to limit or confine myself in the use of this improved type of solenoid for the operation of valves, as it can be applied with equal advantage wherever so lenoids are used; greatly increasing their force and efiiciency.

When the steam is turned on the valve shown the passage 31 is open, by reason of the auxiliary-valve stem being in its lowest position, as shown in Fig. 2, permitting flow throu h valve 6. When the thermostat 30 closes circuit through the coils of solenoid 27, and-said solenoid lifts itsplunaer 49, the part 51 of the liner 50 engages is lower end of the stem 38 of pilot valve 26 and lifts said pilot valve, thus closing the passage 31 of valve 6. When the thermostat 30 opens the circuit of the solenoid the latter is deedergized and the plunger 49 falls permitting auxiliary valve 26 to open.

Having thus described my invention what I claimand desire to secure by Letters Patent is 2-- spool, of a core of magnetic material inserted therein, a gulde tube wit-hm the core ,and extended below the same, a slide rod within the tube, and an armature slidably mounted within the spool and having means for engaging andactuating the slide rod within the tube.

2. In a solenoid of the class described, the combination with a suitable wire wound spool, of a core of magnetic material inserted therein, a guide tube within the core and having an extended threaded portion adapted for attachment to a support, a slide rod within the tube and extending beyond both ends thereof, and an armature slidably mounted within the spool and having means for engaging and actuating said slide rod.

' 3. In a solenoid of the class described, the combination with a suitable spool, of a core of magnetic material mounted therein, an armature slidably mounted within the spool, a liner of non-magnetic material secured to the armature, a collar to support the liner and armature, and means for supporting said collar.

4. In a solenoid of the class described, the combination with a suitable \vire woul nd spool, of a core of magnetic materialtherein, a guide tube within the core, a slide rod within the tube, an armature slidably mounted within the spool and having secured to it a liner of non-magnetic material, said liner provided with .means for actuating said rod, and means for supporting the armature within the spool.

5. In a solenoid of the class described, the combination with a suitable wire wound spool having an extension, of a core of magnetic material mounted in the end portion of the spool, a tube within the core and extended beyond the windings of the spool, an armature slidably mounted within the spool, and a pin slidably mounted within and extended beyond the end of the tube and designed to be operated upon by the armature. no

6. In a solenoid of the class described, the combination with a suitable wire wound spool having an extension, of a core of magnetic material: mounted in the end portion of the s 001, a tube within the core and extended eyond the windings of the spool, an armature slidably'mounted within the spool, a pin slidably mounted within ar l extended beyond the end of the tube and designed to be operated upon by the armature, a casing-for inclosing the wire wound solenoid, a lining of non-magnetic material for the armature, a collar to engage the extension of the spool and to support the arma- 1 ture, and a removable cap to support the collar and liner.

7. In a solenoid of the class described, the combination with a suitable wire wound spool, of a core of magnetic material supported therein, a guide tube within the core,

a slide rod within the tube, a hollow armature slidably mounted within the spool to operate the rod and having a liner of nonmagnetic material therein,

for supporting the armature within the inclose the spool, and a casing connected to solenoid.

8. In a solenoid of the class described, the

combination with a suitable wire spool, of a core of magnetic material mount ed in the upper end portion of the spool, a guide tube extended below the core, a hol- Copies of this patent may be obtained. for

a removable cap low armature slidably mounted to operate" over the tube and within the spool and a rod mounted within said guide tube and ar- 16 ranged to be engaged by said armature.

Signed at Bridgeport, in the county of Fairfield, and State of Connecticut, this 28th day of May, A. D., 1910. wound GEOLLIE W. COLLIN.

Witnesses:

C. M. NEWMAN,

W. LE RoY KETCHUM.

five cents each, by addressing the Commissioner of Patents, Washington, D. C." 

